>>> [!note] Migrated issue <!-- Drupal.org comment --> <!-- Migrated from issue #3549366. --> Reported by: [ressa](https://www.drupal.org/user/102134) Related to !64 >>> <h3 id="summary-problem-motivation">Problem/Motivation</h3> <p>Some Drupal users may want to use Redis as a caching solution, but have no experience at all with setting it up.</p> <p>Perhaps we can list the minimal steps required to get Redis up and running in popular environments, such as DDEV and a standard Debian Apache server?</p> <h4 id="summary-steps-reproduce">Steps to reproduce</h4> <p>Look at the documentation and feel overwhelmed.</p> <h3 id="summary-proposed-resolution">Proposed resolution</h3> <p>List the basic steps to set up Redis in popular environments, such as DDEV and a standard Debian Apache server. </p> <p>The text below is adapted from these articles:</p> <ul> <li><a href="https://cyberschorsch.dev/drupal/elevating-drupals-capabilities-redis-advanced-data-management">https://cyberschorsch.dev/drupal/elevating-drupals-capabilities-redis-advanced-data-management</a></li> <li><a href="https://blog.oloma.dev/redis-server-and-php-extension-installation-on-ubuntu-22-04-lts-for-olobase-8c88dacb23ec">https://blog.oloma.dev/redis-server-and-php-extension-installation-on-ubuntu-22-04-lts-for-olobase-8c88dacb23ec</a></li> <li><a href="https://davidloor.com/en/blog/drupal-caching-opcache-apcu-redis-memcached-guide">https://davidloor.com/en/blog/drupal-caching-opcache-apcu-redis-memcached-guide</a></li> </ul> <blockquote><h3>Setting up Redis in DDEV</h3> <p>Install <a href="https://www.drupal.org/project/redis">Redis</a>, as you would normally <a href="https://www.drupal.org/docs/extending-drupal/installing-drupal-modules">install a Drupal module</a>.</p> <p>Install the DDEV Redis add-on and restart DDEV. A new service is created, and the required Redis settings files are added automatically in <code>web/sites/default/settings.ddev.redis.php</code>:</p> <pre>$ ddev get ddev/ddev-redis<br>$ ddev restart</pre><p>You should be good to go; Drupal will store its cache in the Redis database. Check by visiting a cached page, then open the Redis command line with <code>ddev redis-cli</code>, type <code>KEYS *</code>, and press "Enter" (you should see many lines):</p> <pre>user@my-os:~/d11$ ddev redis-cli<br>redis:6379&gt; KEYS *<br>&nbsp; 1) "drupal.redis.11.1.2..9d1624a8107bff73ae7af14c80a445f594b449fda83e3d7aec06b888c9966d1e:data:route_provider [...]</pre><p>Verify if Redis is used by issuing the <a href="https://youtu.be/9-7JmKD5jtk?feature=shared&amp;t=643">MONITOR command</a> in the Redis CLI tool. Browse the site, and you should see a lot of queries:</p> <pre>user@my-os:~/d11$ ddev redis-cli<br>redis:6379&gt; MONITOR<br>1759182999.868342 [0 172.19.0.5:60202] "HGETALL" "drupal.redis.11.1.2..9d1624a8107bff73ae7af14c80a445f594b [...]</pre><p>Adapted from <a href="https://cyberschorsch.dev/drupal/elevating-drupals-capabilities-redis-advanced-data-management">https://cyberschorsch.dev/drupal/elevating-drupals-capabilities-redis-advanced-data-management</a>.</p> <h3>Setting up Redis on Debian/Apache server</h3> <p>Install the Redis package (which creates a new service) and the PHP Redis extension on the server, and enable it:</p> <pre>$ sudo apt install redis-server php-redis<br>$ sudo phpenmod redis</pre><p>Check if it is running:</p> <pre>$ sudo service redis status</pre><p>Make it start automatically after every boot:</p> <pre>$ sudo systemctl enable redis-server</pre><p><strong>Redis settings</strong></p> <p>To set up Redis settings on the server, copy the content of <a href="https://git.drupalcode.org/project/redis/-/blob/2.x/settings.redis.example.php">https://git.drupalcode.org/project/redis/-/blob/2.x/settings.redis.example.php</a> into the <code>web/sites/default/settings.php</code> file (leave out the first line, with <code>&lt;?php</code>).</p> <p>It sets up the basic settings for Redis, and includes additional optional settings.</p> <p>Verify with <code>redis-cli</code> that Redis is working and caching content. Congratulations, you are now caching with Redis!</p> <p><strong>Additional information</strong></p> <p>For more background on installation and configuration, for example Redis performance tuning:</p> <ul> <li><a href="https://blog.oloma.dev/redis-server-and-php-extension-installation-on-ubuntu-22-04-lts-for-olobase-8c88dacb23ec">Redis Server and Php Extension Installation on Ubuntu 22.04 LTS</a></li> <li><a href="https://davidloor.com/en/blog/drupal-caching-opcache-apcu-redis-memcached-guide">How to speed up Drupal with the right caches: OPcache, APCu, and a shared backend (Redis or Memcached)</a></li> </ul> </blockquote> <h3 id="summary-remaining-tasks">Remaining tasks</h3> <p>Decide if this can be added in a documentation page?</p> <h3 id="summary-ui-changes">User interface changes</h3> <h3 id="summary-api-changes">API changes</h3> <h3 id="summary-data-model-changes">Data model changes</h3>